Defined prime number, a function

#include <stdio.h>
 // define a determined prime function 
void sushu ( int S) {
 int I, J, K = 0 ;
 for (I = 2 ; I <S; I ++ )
 IF (% I S == 0 ) { 
K = . 1 ;
 BREAK ; 
} 
IF (K == . 1 ) 
the printf ( " % D is not prime " , S);
 IF (K == 0 ) 
the printf ( " % D is a prime number " );
 return  0 ; 
} 

/ / verification 
intmain () {
 int A;
 the while ( . 1 ) { 
the printf ( " \ n-enter the number to be determined: \ n- " ); 
Scanf ( " % D " , & A ); 
sushu (A); 
} 
return  0 ; 
}